Been there, done that...not any fun. Brokerage environment; UDP directed-broadcast traffic to nearly 200 sites. Buffers tuned to the max to keep from dropping packets because the application didn't handle re-transmissions...etc., etc., Of course, priority queuing was required to ensure that web browsing wasn't stepping on the mission-critical app. RSP4's in the 7500's were running into the 90% range on a regular basis...couldn't talk the client into spending the $$ to re-design the network; they couldn't understand why the users were complaining about poor network performance. They figured that if the processors were running near 100% that they were getting their $$ out of the infrastructure investment - I still have bad dreams about it :) - working for a new client now... :)
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED] Sent: Monday, November 19, 2001 4:34 PM To: [EMAIL PROTECTED] Subject: Re: CPU Usage - How Much Is Too Much? [7:26739] >From personal experience I'd put that figure at 3% too high :-) In the dim dark past we were running some 7500s with badly overloaded RSPs. They would run with no discernible problems up to 97% or 98% CPU. Then late morning the traffic load would build up, and output queues on some of the ports would eventually overrun, and DLSW circuits would start to bounce, and the network would go into meltdown very spectacularly. For various reasons it took us a while to get hold of upgraded RSPs, so peak hour wasn't a lot of fun for us or the network users... YMMV. I do *not* recommend running at 97% CPU on a production network. JMcL ----- Forwarded by Jenny Mcleod/NSO/CSDA on 20/11/2001 09:26 am ----- "MADMAN" cc: Sent by: Subject: Re: CPU Usage - How Much Is Too nobody@groups Much? [7:26739] tudy.com 20/11/2001 06:06 am Please respond to "MADMAN" 101% but seriously there is no hard 'n fast number but there is no reason you can't run at 60-70%, leaving enough room for burst in CPU activity so that you never hit 101%. Dave Andrew Michael wrote: > > Hi everyone. > > Percentage-wise, what is the general consensus on excessive CPU usage on a > router? > > Thanks in advance. -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26892&t=26739 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
